ESOMAT 2009, 04005 (2009)
DOI: 10.1051/esomat/200904005

Study of the martensitic transformation in the Hafnium-Palladium system

C. Declairieux¹, P. Vermaut¹, R. Portier¹, P. Ochin², V. Kolomytsev³, A. Pasko⁴ and G. Monastyrsky<sup>5

1</sup>  Chimie ParisTech, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France
²  Institut de Chimie et des Matériaux Paris-Est, CNRS, 2-8 rue Henri Dunant, 94320 Thiais, France
³  Institute of Metal Physics of NASU, 36 Vernadsky av., 03142 Kyiv, Ukrain
⁴  SATIE, Ecole Normale Supérieure de Cachan, 61 av. du Président Wilson, 94235 Cachan, France
⁵  National Technical University of Ukraine, 37 Peremogy av., 03058 Kyiv, Ukraine

charles-declairieux@enscp.fr

Published online: 1 September 2009

Abstract
High temperature shape memory alloys have received a large interest for many years but none of the systems studied so far has led to industrial applications. Those alloys are expected to develop an actuating role in high temperature environment as for example aircraft turbines. Lots of criteria are required in order to substitute or optimize heavy existing actuators. Here are presented a few results obtained with the system hafnium-palladium, not so documented for the moment, that develops a martensitic transformation at around 773 K. According to the characteristics of very well-known alloys such as NiTi, some compositions around the equiatomic are explored. The main ob jective of our work is to know the influence of a stoechiometry gap on the microstructure of the alloys and the martensitic transformation.

© Owned by the authors, published by EDP Sciences 2009